At 01.56, 01.59 and 02.06 hours on 12 May 1942, U-124 fired torpedoes at the convoy ONS-92 southeast of Cape Farewell and observed hits on three ships. At 02.22 hours, the U-boat made a second attack and observed one hit amidships after 1 minute 56 seconds. Mohr claimed three ships with 16.100 tons sunk. However, only two ships were hit at the time of the first attack, the Empire Dell and Llanover.

The badly damaged Llanover (Master Lionel Alfred Osborne) was scuttled by HMCS Arvida (K 113) (T/Lt A.I. MacKay, RCNR). The master, 39 crew members and six gunners were picked up by the British rescue ship Bury (Master Lawrence Edwin Brown, OBE) and landed at St. John’s on 16 May.